139606277 has 2 divisors, whose sum is σ = 139606278. Its totient is φ = 139606276.

The previous prime is 139606273. The next prime is 139606279. The reversal of 139606277 is 772606931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100681156 + 38925121 = 10034^2 + 6239^2 .

It is an emirp because it is prime and its reverse (772606931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139606277 - 2² = 139606273 is a prime.

Together with 139606279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139606273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69803138 + 69803139.

It is an arithmetic number, because the mean of its divisors is an integer number (69803139).

Almost surely, 2^139606277 is an apocalyptic number.

It is an amenable number.

139606277 is a deficient number, since it is larger than the sum of its proper divisors (1).

139606277 is an equidigital number, since it uses as much as digits as its factorization.

139606277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 139606277 is about 11815.5100186154. The cubic root of 139606277 is about 518.7621902201.

The spelling of 139606277 in words is "one hundred thirty-nine million, six hundred six thousand, two hundred seventy-seven".